As billb points out, it's only officially compatible with Win7 right now. Of course it could be compatible with OS X, or not. It might simply be that the company isn't interested in testing against OS X, or has tested and it's not compatible. However they do have OS X compatible displays so who knows?

Then again, Amazon is selling it for $250 so that makes a reasonably priced 22" display even if the touch screen part doesn't work in OS X.

If you contacted Planar they might not be able to tell you if it's compatible with 10.7 until 10.7 comes out(any minute now).

The multi-touch gestures built into OSX should work, then if I throw a little NUI on top (for our resident Vet, that's http://nuigroup.com/forums) I should have a more than adequate mutli-touch environment inside of OSX.

Monitor should be ordered this weekend (bills come first), will post update if anyone else is interested.